On the validity of the Zel'dovich approximation

Details On the validity of the Zel'dovich approximation On the validity of the Zel'dovich approximation

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...320..448g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 320, Sept. 15, 1987, p. 448-453.

Statistics

Computation

50

Computational Astrophysics, Cosmology, Gravitation Theory, Perturbation Theory, Relic Radiation, Space Density, Galactic Clusters, Hubble Constant, Probability Distribution Functions

Scientific paper

The Zel'dovich approximation is often used to mimic the effects of nonlinear gravitational time evolution. The authors compare the predictions of the Zel'dovich approximation with those of the true nonlinear time evolution, for the probability distribution of mass density fluctuations averaged over a Gaussian ball of large radius, and for the large-scale streaming velocities of objects that do not trace the mass.

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